T Mobile Business - Client Side Cross Site Scripting Vulnerability

[Vulnerability Lab <research () vulnerability-lab com>]

Document Title:
===============
T Mobile Business - CS Cross Site Scripting Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1566


Release Date:
=============
2015-08-10


Vulnerability Laboratory ID (VL-ID):
====================================
1566


Common Vulnerability Scoring System:
====================================
2.5


Product & Service Introduction:
===============================
T-Mobile International AG is a German holding company for Deutsche Telekom AG\\\\\\\'s various mobile communications 
subsidiaries outside Germany. 
Based in Bonn, Germany, its subsidiaries operates GSM, UMTS and LTE-based cellular networks in Europe, the United 
States, Puerto Rico, and 
the U.S. Virgin Islands. The company has financial stakes in mobile operators in both Central and Eastern Europe.


Abstract Advisory Information:
==============================
An independent vulnerability laboratory researcher discovered a client-side cross site scripting web vulnerability in 
the official T-Mobile online service web-application.


Vulnerability Disclosure Timeline:
==================================
2015-07-22:     Researcher Notification (Murat Yilmazlar)
2015-07-29:     Vendor Response/Feedback ( T-Mobile Security Team - Bug Bounty Team)
2015-08-10:     Public Disclosure (Vulnerability Laboratory)


Discovery Status:
=================
Published


Exploitation Technique:
=======================
Remote


Severity Level:
===============
Medium


Technical Details & Description:
================================
A non persistent cross site scripting web vulnerability has been discovered in the official T-Mobile Business online 
service web-application.
The vulnerability allows remote attackers to hijack website customer, moderator or admin sessions data by client-side 
manipulated cross site requests.

The vulnerability is located in the controller parameter Primary&Ntt of the search module. Remote attackers are able to 
inject script code to manipulate 
client-side application to browser requests. The request method to inject is GET and the attack vector is located on 
the client-side of the online-service.

The security risk of the client-side  cross site web vulnerability is estimated as medium with a cvss (common 
vulnerability scoring system) count of 2.5. 
Exploitation of the client-side cross site scripting web vulnerability requires no privilege web application user 
account and low or medium user interaction. 
Successful exploitation results in client-side account theft by hijacking, client-side phishing, client-side external 
redirects and non-persistent manipulation 
of affected or connected service modules.


Request Method(s):
                                [+] GET

Vulnerable Domain(s):
                                [+] find.business.t-mobile.com

Vulnerable Module(s):
                                [+] Controller

Vulnerable File(s):
                                [+] 10001&Ntk

Vulnerable Parameter(s):
                                [+] Primary&Ntt


Proof of Concept (PoC):
=======================
The vulnerability can be exploited by remote attackers without privilege web-application user account and with low or 
medium user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to 
continue.

PoC:
http://find.business.t-mobile.com
';alert(String.fromCharCode(88,83,83))//';alert(String.fromCharCode(88,83,83))//";alert(String.fromCharCode(88,83,83))//";
alert(String.fromCharCode(88,83,83))//--></sCRipT>">'><sCRipT>alert(String.fromCharCode(88,83,83))</sCRipT>

PoC Image: http://i.imgur.com/klCXPmL.png


Solution - Fix & Patch:
=======================
The vulnerability has been fixed/patched by the T-Mobile security team since 30th August 2015.


Security Risk:
==============
The security risk of the client-side cross site scripting web vulnerability in the t-mobile search module is estimated 
as medium. (CVSS 2.5)


Credits & Authors:
==================
Contact:     muratyilmazlar1 () gmail com       
Social:      twitter.com/muratyilmazlarr          facebook.com/murat.yilmazlar.9        
tr.linkedin.com/in/muratyilmazlarr



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=========================
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